CN106443591A - Phased array radar multifunctional sub-array beam forming network - Google Patents

Abstract

A phased array radar multifunctional sub-array beamforming network, consisting of a first-level sub-array beamforming network, two second-level sub-array beamforming networks, four third-level sub-array beamforming networks, and a first-level subarray beamforming network The network includes a first-level transmit port and a first-level receive port, two-way two-way sub-array beamforming networks include their own two-level transmit ports and two-level receive ports, and four-way three-level sub-array beamforming networks include their own third-level transmit ports , the third-level receiving port and the TR channel interface, the two sub-ports of the first-level sub-array beamforming network are respectively connected to the two-way secondary sub-array beamforming network, and the four branches of the two-way secondary sub-array beamforming network The ports are respectively connected to the four-way three-level sub-array beamforming network. The present invention has the advantages of using one network to form sub-array beams of different scales, and the sub-array beam forming networks of different scales can be used simultaneously or separately. Compared with the prior art, it has the advantages of small amount of equipment and multiple functions.

Description

A Phased Array Radar Multifunctional Subarray Beamforming Network

technical field

The invention relates to a beam forming network, in particular to a phased array radar multifunctional sub-array beam forming network.

Background technique

The digitalization of the sub-array at the front end of the transceiver has become the development trend of the phased array radar, and the beamforming network is an important part of the phased array radar to realize the digitalization of the sub-array. When transmitting, the beamforming network plays the role of distributing the output power of the subarray digital transmitter to each subarray’s transmitting TR channel; when receiving, the beamforming network plays the role of synthesizing the signals received by each subarray TR channel into one or more beams and output to the sub-array digital receiver. Therefore, the beamforming network of phased array radar is a system that connects many TR channels on the array with sub-array digital receivers or transmitters and transmits signals.

Figure 1 is a schematic diagram of a prior art phased array radar receiving front-end beamforming network, the receiving channel is composed of 16 TR channels from TR1 to TR16, and the signals received by every four TR channels are formed by a sub-array beam The network synthesizes a sub-array beam, and the four sub-array beams formed are respectively input to the four channels of the digital receiver.

The beamforming network of this prior art is simple in design and can be designed based on various types of power splitters or Rotman lenses. At the same time, 4-way, 8-way Sub-array beamforming networks of different sizes such as 16 channels or 16 channels. However, the disadvantage of this prior art beamforming network is that sub-array beamforming networks of different scales such as 4, 8, and 16 channels cannot be shared, and the purpose of sharing transmission and reception cannot be realized, and the function is single, which cannot meet modern requirements. Phased array radar is developing towards multi-function and digitalization.

Contents of the invention

The technical problem to be solved by the present invention is to provide a phased array radar multifunctional sub-array beamforming network, which uses the same network to form sub-array beams of different sizes, and transmits and receives in common without interfering with each other, so as to realize the sub-array beamforming network multifunctional.

The present invention solves the above-mentioned technical problems through the following technical solutions: the phased array radar multifunctional sub-array beamforming network of the present invention consists of a first-level sub-array beamforming network 1, a first-level secondary sub-array beamforming network 2, a second The first two-level sub-array beamforming network 3, the first three-level sub-array beamforming network 4, the second three-level sub-array beamforming network 5, the third three-level sub-array beamforming network 6, and the fourth three-level beamforming network The first-level sub-array beamforming network 7 is composed of the first-level sub-array beamforming network 1 including the first-level transmitting port 11 and the first-level receiving port 12, and the second-level sub-array beamforming network 2 includes the second-level transmitting port 21 and the second-level receiving port 12. Level receiving port 22, the second-level sub-array beamforming network 3 includes a second-level transmitting port 31 and a second-level receiving port 32, and the first-way three-level sub-array beamforming network 4 includes a third-level transmitting port 41 , tertiary receiving port 42, TR channel interface 401, TR channel interface 402, TR channel interface 403 and TR channel interface 404, and the second road tertiary subarray beamforming network 5 includes a tertiary transmitting port 51, a tertiary receiving port port 52, TR channel interface 501, TR channel interface 502, TR channel interface 503, and TR channel interface 504, the third three-level subarray beamforming network 6 includes a three-level transmit port 61, a three-level receive port 62, a TR Channel interface 601, TR channel interface 602, TR channel interface 603, and TR channel interface 604, the fourth three-level subarray beamforming network 7 includes a three-level transmit port 71, a three-level receive port 72, a TR channel interface 701, TR channel interface 702 , TR channel interface 703 and TR channel interface 704 .

The two ports of the primary sub-array beamforming network 1 are respectively connected to the main ports of the first secondary sub-array beamforming network 2 and the second secondary sub-array beamforming network 3. The two ports of the second-level sub-array beamforming network 2 are respectively connected to the main ports of the first three-level sub-array beamforming network 4 and the third three-level sub-array beamforming network 6, and the second two-level The two ports of the sub-array beamforming network 3 are respectively connected to the main ports of the second three-stage sub-array beamforming network 5 and the fourth three-stage sub-array beamforming network 7 .

The TR channel interface 401, TR channel interface 402, TR channel interface 403, and TR channel interface 404 are four sub-ports of the first three-level subarray beamforming network 4, and the TR channel interface 501, TR channel interface 502 , TR channel interface 503 and TR channel interface 504 are the four sub-ports of the second three-level subarray beamforming network 5, and TR channel interface 601, TR channel interface 602, TR channel interface 603 and TR channel interface 604 are the third The four sub-ports of the third-level sub-array beamforming network 6, the TR channel interface 701, the TR channel interface 702, the TR channel interface 703 and the TR channel interface 704 are the four sub-ports of the first three-level sub-array beamforming network 4. mouth.

The first-level transmitting port 11 is connected to the digital transmitter of the phased array radar, and the RF excitation signal input by the digital transmitter passes through the first-level sub-array beamforming network 1, the second-level sub-array beamforming networks 2 and 3, and the third-level sub-array beamforming network. Subarray beamforming networks 4, 5, 6 and 7 are divided into sixteen channels and then output to sixteen TR components of the phased array radar through sixteen TR channel interfaces to realize sixteen channel-scale subarray launch beams Forming function; the radio frequency signals received by the sixteen TR components pass through the three-level sub-array beamforming networks 4, 5, 6 and 7 in turn, the second-level sub-array beamforming networks 2 and 3, and the first-level sub-array beamforming The network 1 synthesizes a beam, and then outputs it to the digital receiver of the phased array radar through the first-level receiving port 12, realizing the function of receiving beams formed by a subarray of sixteen channels.

The RF excitation signal of the digital transmitter sequentially passes through the secondary transmission port 21, the first secondary sub-array beamforming network 2, the tertiary sub-array beamforming networks 4, 6 and TR channel interfaces 401, 402, 403, 404 , 601, 602, 603, and 604 are divided into eight channels of signals and output to eight corresponding TR components of the phased array radar, so as to realize the function of the first eight channel-scale subarray transmit beamforming; the eight TR components received The signals pass through the TR channel interfaces 401, 402, 403, 404, 601, 602, 603, 604, the third-level sub-array beamforming networks 4 and 6, the first second-level sub-array beamforming network 2 and the second-level transmission port 22. Combined into one beam and output to the digital receiver to realize the function of the first eight-channel subarray receive beamforming.

The RF excitation signal of the digital transmitter sequentially passes through the secondary transmission port 31, the second secondary sub-array beamforming network 3, the tertiary sub-array beamforming networks 5, 7 and TR channel interfaces 501, 502, 503, 504 , 701, 702, 703, and 704 are divided into eight channels of signals and output to eight corresponding TR components of the phased array radar, realizing the function of the second channel of eight channel-scale subarray beamforming; the eight TR components received The signals pass through the TR channel interfaces 501, 502, 503, 504, 701, 702, 703, 704, the third-level sub-array beamforming networks 5 and 7, the second second-level sub-array beamforming network 3 and the second-level transmission port 32. Merge them into one beam and output it to the digital receiver to realize the function of the second eight-channel-scale subarray receiving beamforming.

The radio frequency excitation signal of the digital transmitter passes through the three-level transmission port 41 successively, and the first three-level sub-array beamforming network 4 and the TR channel interface 401, 402, 403, 404 are divided into four signals and output to the phased array radar. The four corresponding TR components realize the function of beamforming of the first four-channel-scale subarray; the signals received by the four TR components pass through the TR channel interfaces 401, 402, 403, and 404 in turn, and the first three The sub-array beamforming network 4 of the first stage and the transmitting port 42 of the third stage are combined into one beam and output to the digital receiver, realizing the function of the first four-channel-scale subarray receiving beamforming.

The radio frequency excitation signal of the digital transmitter passes through the three-level transmission port 51 in turn, and the second three-level sub-array beamforming network 5 and the TR channel interface 501, 502, 503, 504 are divided into four signals and output to the phased array radar. The four corresponding TR components realize the function of transmitting beamforming of the sub-array with four channels in the second channel; the signals received by the four TR components pass through the TR channel interfaces 501, 502, 503, 504 in turn, and the second channel three The first-level subarray beamforming network 5 and the third-level transmitting port 52 are combined into one beam and output to the digital receiver, realizing the function of the second four-channel-scale subarray receiving beamforming.

The radio frequency excitation signal of the digital transmitter passes through the three-level transmission port 61 successively, and the third three-level sub-array beamforming network 6 and the TR channel interface 601, 602, 603, 604 are divided into four signals and output to the phased array radar. The four corresponding TR components realize the function of beamforming of the sub-array transmit beam on the scale of four channels of the third channel; The first-level subarray beamforming network 6 and the third-level transmitting port 62 are combined into one beam and output to the digital receiver, realizing the function of the third four-channel-scale subarray receiving beamforming.

The radio frequency excitation signal of the digital transmitter passes through the three-level transmission port 71 sequentially, and the fourth three-level sub-array beamforming network 7 and the TR channel interface 701, 702, 703, 704 are divided into four signals and output to the phased array radar. The four corresponding TR components realize the function of the fourth four-channel-scale subarray transmit beamforming; the signals received by the four TR components pass through the TR channel interfaces 701, 702, 703, and 704 in turn, and the fourth three-channel The first-level subarray beamforming network 7 and the third-level transmitting port 72 are combined into one beam and output to the digital receiver, realizing the function of the fourth four-channel-scale subarray receiving beamforming.

The first-level subarray beamforming network 1, the first second-level sub-array beamforming network 2, the second second-level sub-array beamforming network 3, the first third-level sub-array beamforming network 4, and the second The three-level sub-array beamforming network 5 , the third three-level sub-array beamforming network 6 and the fourth three-level sub-array beamforming network 7 can be used simultaneously or separately.

The 16 TR channel interfaces are arranged in an equidistant area array, which can realize one-to-one blind matching interconnection with the 16 TR components of the phased array radar, eliminating the need for connection of radio frequency cables, thereby reducing insertion loss.

Compared with the prior art, the present invention has the following advantages:

The subarray beamforming network of the present invention can use one network to form subarray beams of different scales, and the subarray beamforming networks of different scales can be used at the same time or independently. The scheme of forming subarray beams of different scales has the advantages of small amount of equipment and multiple functions.

Each sub-array beam forming network of the present invention has the function of receiving and transmitting, the transmitting and receiving share a network, and the isolation degree of transmitting and receiving is high.

The layout and shape of the sub-array beamforming network of the present invention can be adjusted according to the layout of the phased array radar array and the size of the unit spacing, so as to realize the one-to-one blind matching interconnection between the TR channel interface and the TR component interface of the phased array radar. The connection of RF cables is omitted, thereby reducing insertion loss.

Description of drawings

In order to illustrate the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a block diagram of a prior art phased array radar receiving front-end beamforming network;

Fig. 2 is a block diagram of modules of a phased array radar multifunctional sub-array beamforming network of the present invention;

Fig. 3 is a schematic diagram of the principle of a phased array radar multifunctional sub-array beamforming network in Fig. 2;

Fig. 4 is the standing wave curve figure of port 11 and port 12 of the present invention;

Fig. 5 is the standing wave curve diagram of port 21 and port 22 of the present invention;

Fig. 6 is the standing wave curve diagram of port 31 and port 32 of the present invention;

Fig. 7 is the standing wave curve diagram of port 41 and port 42 of the present invention;

Fig. 8 is the standing wave curve diagram of port 51 and port 52 of the present invention;

Fig. 9 is the standing wave curve diagram of port 61 and port 62 of the present invention;

Fig. 10 is a standing wave curve diagram of port 71 and port 72 of the present invention.

In the figure: 1 first-level subarray beamforming network, 11 first-level transmitting ports, 12 first-level receiving ports, 13 ring isolator, 14 power splitter; 2 first-level second-level sub-array beamforming network, 21 second-level transmitting Ports, 22 secondary receiving ports, 23 ring isolators, 24, 25 power splitters; 3 second secondary subarray beamforming network, 31 secondary transmitting ports, 32 secondary receiving ports, 33 circular isolators, 34 , 35 power dividers; 4 the first three-level subarray beamforming network, 41 three-level transmit ports, 42 three-level receive ports, 43 ring isolators, 44, 45, 46, 47 power dividers, 401, 402, 403, 404 TR channel interface; 5 second three-level sub-array beamforming network, 51 three-level transmit port, 52 three-level receive port, 53 ring isolator, 54, 55, 56, 57 power splitter, 501, 502, 503, 504 TR channel interface; 6 third-way three-level subarray beamforming network, 61 three-level transmit port, 62 three-level receive port, 63 ring isolator, 64, 65, 66, 67 power splitter, 601, 602, 603, 604 TR channel interface; 7 fourth third-level subarray beamforming network, 71 third-level transmitting port, 72 third-level receiving port, 73 ring isolator, 74, 75, 76, 77 Wilkinson power splitter, 701 , 702, 703, 704TR channel interface.

detailed description

The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

As shown in Figure 2 and Figure 3, this embodiment takes a phased array radar multi-functional sub-array beamforming network application at 2.2GHz as an example, the TR channel interface sub-array size is set to 4×4, which is suitable for 4×4 Subarray-scale active phased array antenna. The multifunctional subarray beamforming network of this embodiment is designed based on Wilkinson power splitters and circulators. The Wilkinson power divider is processed based on microwave circuit board technology, the dielectric model is Arlon CLTE-XT, the single layer thickness is 0.254mm, the dielectric constant is 2.94, and the isolation resistance value is 100 ohms. The circulator model is Narda 4923, the working frequency range is 2GHz-4GHz, the standing wave at the port is less than 1.3, and the insertion loss is 0.4dB. This embodiment consists of three levels of sub-arrays, which are: a first-level sub-array beamforming network 1, a second-level sub-array beamforming network 2 and 3, and a third-level sub-array beamforming network 4, 5, 6 and 7.

As shown in Figure 3, the primary subarray beamforming network 1 is composed of a primary transmitting port 11, a primary receiving port 12, a circulator 13 and a Wilkinson power splitter 14; a primary transmitting port 11 and a primary receiving port 12 are the transmission input port and the reception output port of the circulator 13 respectively, and the main port of the circulator 13 is connected with the main port of the Wilkinson power divider 14 .

As shown in FIG. 3 , the first secondary subarray beamforming network 2 is composed of a secondary transmitting port 21, a secondary receiving port 22, a circulator 23 and Wilkinson power splitters 24, 25; the secondary transmitting port 21 and the secondary receiving port 22 are respectively the transmitting input port and the receiving output port of the circulator 23; The total port of 23 is connected with the branch port of Wilkinson power divider 14. The second secondary subarray beamforming network 3 is composed of a secondary transmitting port 31, a secondary receiving port 32, a circulator 33, and a Wilkinson power splitter 34, 35; a secondary transmitting port 31 and a secondary receiving port 32 They are respectively the transmitting input port and the receiving output port of the circulator 33, the main port and the two sub-ports of the Wilkinson power splitter 34 are respectively connected with the main port of the Wilkinson power splitter 35, the main port and the power port of the circulator 33. The split port connection of the Erkinson power splitter 14.

As shown in FIG. 3 , the first three-level subarray beamforming network 4 is composed of a three-level transmit port 41, a three-level receive port 42, a circulator 43, and Wilkinson power splitters 44, 45, 46, and 47; The first-stage transmitting port 41 and the third-stage receiving port 42 are respectively the transmitting input port and the receiving output port of the circulator 43, and the total port and the two branch ports of the Wilkinson power divider 44 are respectively connected with the total port of the Wilkinson power divider 45. The total mouth of mouth, circulator 43 is connected with the branch port of Wilkinson power divider 25, and the total port of Wilkinson power divider 46 and 47 is connected with two branch ports of Wilkinson power divider 45 respectively, and Wei The four ports of the Erkinson power splitters 46 and 47 are respectively connected to the TR channel interfaces 401 , 402 , 403 and 404 . The second three-level subarray beamforming network 5 is composed of a three-level transmitting port 51, a three-level receiving port 52, a circulator 53, and Wilkinson power splitters 54, 55, 56, and 57; the third-level transmitting port 51 and the three-level Stage receiving port 52 is respectively the transmitting input port and the receiving output port of circulator 53, and the main mouth and two sub-ports of Wilkinson power divider 54 are respectively connected with the main mouth of Wilkinson power divider 55 and the circulator 53. The main port is connected to the branch port of the Wilkinson power splitter 35, the total port of the Wilkinson power splitter 56 and 57 is respectively connected to the two branch ports of the Wilkinson power splitter 55, and the Wilkinson power splitter 56 and 57 are respectively connected with TR channel interfaces 501, 502, 503 and 504. The third three-level subarray beamforming network 6 is composed of a three-level transmit port 61, a three-level receive port 62, a circulator 63, and Wilkinson power splitters 64, 65, 66, and 67; the three-level transmit port 61 and the three-level Stage receiving port 62 is respectively the transmission input port and the receiving output port of circulator 63, and the main mouth and two sub-ports of Wilkinson power divider 64 are respectively connected with the main mouth of Wilkinson power divider 65 and the circulator 63. The main port is connected to the branch port of Wilkinson power splitter 25, the main ports of Wilkinson power splitter 66 and 67 are respectively connected to the two branch ports of Wilkinson power splitter 65, and the Wilkinson power splitter 66 and 67 are respectively connected with TR channel interfaces 601, 602, 603 and 604. The fourth three-level subarray beamforming network 7 is composed of a three-level transmitting port 71, a third-level receiving port 72, a circulator 73, and Wilkinson power splitters 74, 75, 76, and 77; a third-level transmitting port 71 and a third-level Stage receiving port 72 is respectively the transmitting input port and the receiving output port of circulator 73, and the main mouth and two sub-ports of Wilkinson power divider 74 are respectively connected with the main mouth of Wilkinson power divider 75 and the circulator 73. The main port is connected to the sub-port of Wilkinson power splitter 35, the main ports of Wilkinson power splitter 76 and 77 are respectively connected to the two sub-ports of Wilkinson power splitter 75, and the Wilkinson power splitter 76 and 77 are respectively connected with TR channel interfaces 701, 702, 703 and 704.

16 TR channel interfaces 401, 402, 403, 404, 501, 502, 503, 504, 601, 602, 603, 604, 701, 702, 703 and 704 are arranged in an area array at equal intervals, realizing the same as the phased array radar The 16 TR components correspond to blind-match interconnection one by one.

The RF excitation signal output by the digital transmitter of the phased array radar is input by the first-level transmitting port 11, and is divided into two paths through the circulator 13 and the power splitter 14 in turn, and the two-way signals are respectively passed through the power splitter 24 and 25, and the power splitter Dividers 34 and 35 are divided into four routes, and the signals of the four routes are divided into eight routes by power dividers 44 and 45, power dividers 54 and 55, power dividers 64 and 65, and power dividers 74 and 75, and the eight routes of signals are then divided into eight routes by power dividers respectively. Dividers 46, 47, 56, 57, 66, 67, 76, and 77 are divided into sixteen channels, and the signals of the sixteen channels are finally passed through TR channel interfaces 401, 402, 403, 404, 501, 502, 503, 504, 601, 602, 603, 604, 701, 702, 703 and 704 are output to sixteen TR components of the phased array radar to realize the function of sixteen channel-scale subarray transmit beamforming. The radio frequency signals received by the sixteen TR components are input by TR channel interfaces 401, 402, 403, 404, 501, 502, 503, 504, 601, 602, 603, 604, 701, 702, 703 and 704, respectively Dividers 46, 47, 56, 57, 66, 67, 76, 77 synthesize eight routes, and the signals of the eight routes pass through power dividers 45 and 44, power dividers 55 and 54, power dividers 65 and 64, and power divider 75 respectively and 74 to synthesize four routes, and the four routes of signals are synthesized into two routes through power dividers 25 and 24, and power dividers 35 and 34 respectively, and the two routes of signals are then synthesized into one route through power divider 14, and the signals of one route are finally passed through circulator 13 and The first-level receiving port 12 is output to the digital receiver of the phased array radar to realize the function of receiving beamforming of the sixteen-channel subarray.

Or, the RF excitation signal output by the digital transmitter of the phased array radar is input by the secondary transmitting port 21, and is divided into two paths through the circulator 23, the power divider 24 and 25 in turn, and the two-way signals are passed through the power divider 44 and the power divider 25 respectively. 45. The power splitters 64 and 65 are divided into four routes, and the signals of the four routes are divided into eight routes by the power splitters 46, 47, 66, and 67 respectively, and the signals of the eight routes are finally respectively passed through the TR channel interfaces 401, 402, 403, 404, 601, and 602 , 603, and 604 are output to the eight TR components of the phased array radar to realize the function of the first eight-channel-scale subarray transmit beamforming. The radio frequency signals received by the eight TR components are input by TR channel interfaces 401, 402, 403, 404, 601, 602, 603, and 604, and are respectively synthesized into four paths by power splitters 46, 47, 66, and 67, and the four paths of signals are then Two routes are respectively synthesized by power dividers 45 and 44, and power dividers 65 and 64, and then two routes of signals are synthesized by power dividers 25 and 24 respectively, and one route of signals is finally output to The digital receiver of the phased array radar realizes the function of the first eight-channel-scale subarray receiving beamforming.

Or, the RF excitation signal output by the digital transmitter of the phased array radar is input by the secondary transmitting port 31, and is divided into two paths through the circulator 33, the power divider 34 and 35 successively, and the two-way signals are passed through the power divider 54 and the power divider 35 respectively. 55. The power splitters 74 and 75 are divided into four routes, and the signals of the four routes are divided into eight routes by the power splitters 56, 57, 76, and 77 respectively, and finally the signals of the eight routes are respectively passed through the TR channel interfaces 501, 502, 503, 504, 701, and 702 , 703, and 704 are output to the eight TR components of the phased array radar to realize the function of the second eight-channel-scale subarray transmit beamforming. The radio frequency signals received by the eight TR components are input by TR channel interfaces 501, 502, 503, 504, 701, 702, 703, and 704, and are respectively synthesized into four paths by power splitters 56, 57, 76, and 77, and the four paths of signals are then Two routes are synthesized through power dividers 55 and 54, and power dividers 75 and 74 respectively, and the two signals are then synthesized into one route through power dividers 35 and 34 respectively, and one route of signals is finally output to The digital receiver of the phased array radar realizes the function of the receiving beamforming of the second eight-channel subarray.

Or, the RF excitation signal output by the digital transmitter of the phased array radar is input by the three-stage transmitting port 41, and is divided into two paths through the circulator 43, the power divider 44 and 45 in turn, and the signals of the two paths are passed through the power divider 46 and the power divider 45 respectively. 47 is divided into four channels, and the signals of the four channels are finally output to the four TR components of the phased array radar through the TR channel interfaces 401, 402, 403, and 404, so as to realize the function of the first four-channel-scale subarray transmit beamforming. The radio frequency signals received by the four TR components are input by TR channel interfaces 401, 402, 403, and 404, and are respectively synthesized into two channels by power dividers 46 and 47. The signal is finally output to the digital receiver of the phased array radar through the circulator 43 and the third-stage receiving port 42 in turn, realizing the function of the first four-channel-scale subarray receiving beamforming.

Or, the RF excitation signal output by the digital transmitter of the phased array radar is input by the three-stage transmission port 51, and is divided into two paths through the circulator 53, power dividers 54 and 55 in turn, and the two-way signals are passed through the power divider 56 and the power divider 55 respectively. 57 is divided into four channels, and the signals of the four channels are finally output to the four TR components of the phased array radar through the TR channel interfaces 501, 502, 503, and 504, so as to realize the function of the second four-channel-scale subarray transmit beamforming. The radio frequency signals received by the four TR components are input by TR channel interfaces 501, 502, 503, and 504, and are respectively synthesized into two channels by power splitters 56 and 57. The signal is finally output to the digital receiver of the phased array radar through the circulator 53 and the third-stage receiving port 52 in turn, realizing the function of the second four-channel-scale subarray receiving beamforming.

Or, the RF excitation signal output by the digital transmitter of the phased array radar is input by the three-stage transmitting port 61, and is divided into two paths through the circulator 63, the power divider 64 and 65 in turn, and the signals of the two paths are passed through the power divider 66 and the power divider 65 respectively. 67 is divided into four channels, and the signals of the four channels are finally output to the four TR components of the phased array radar through the TR channel interfaces 601, 602, 603, and 604, so as to realize the function of the third channel four-channel-scale subarray transmit beamforming. The radio frequency signals received by the four TR components are input by the TR channel interfaces 601, 602, 603, and 604, and are respectively synthesized into two channels by power splitters 66 and 67. The signal is finally output to the digital receiver of the phased array radar through the circulator 63 and the third-stage receiving port 62 in turn, realizing the function of the third four-channel-scale subarray receiving beamforming.

Or, the RF excitation signal output by the digital transmitter of the phased array radar is input by the three-stage transmission port 71, and is divided into two paths through the circulator 73, the power divider 74 and 75 in turn, and the two-way signals are passed through the power divider 76 and the power divider 75 respectively. 77 is divided into four channels, and the signals of the four channels are finally output to the four TR components of the phased array radar through the TR channel interfaces 701, 702, 703, and 704 respectively, so as to realize the fourth channel four-channel-scale subarray transmit beamforming function. The radio frequency signals received by the four TR components are input by the TR channel interfaces 701, 702, 703, and 704, and are respectively synthesized into two channels by the power dividers 76 and 77, and the two channels of signals are then synthesized into one channel by the power dividers 75 and 74 in turn, and one channel The signal is finally output to the digital receiver of the phased array radar through the circulator 73 and the third-stage receiving port 72 in turn, realizing the function of the fourth four-channel-scale subarray receiving beamforming.

Fig. 4 shows the standing wave curves of the transmitting port 11 and the receiving port 12 of the sub-array transmitting port 11 and receiving port 12 of a multifunctional sub-array beamforming network of a phased array radar of the present invention at 2.2 GHz. FIG. 5 shows the standing wave curves of the transmitting port 21 and the receiving port 22 of the secondary sub-array of a multifunctional sub-array beamforming network of a phased array radar of the present invention at 2.2 GHz. FIG. 6 shows the standing wave curves of the transmitting port 31 and the receiving port 32 of the secondary sub-array of a multifunctional sub-array beamforming network of a phased array radar of the present invention at 2.2 GHz. FIG. 7 shows the standing wave curves of the three-stage subarray transmitting port 41 and receiving port 42 of a phased array radar multifunctional subarray beamforming network of the present invention at 2.2 GHz. FIG. 8 shows the standing wave curves of the three-stage subarray transmitting port 51 and receiving port 52 of a phased array radar multifunctional subarray beamforming network of the present invention at 2.2 GHz. FIG. 9 shows the standing wave curves of the three-stage subarray transmitting port 61 and receiving port 62 of a phased array radar multifunctional subarray beamforming network of the present invention at 2.2 GHz. FIG. 10 shows the standing wave curves of the three-stage subarray transmitting port 71 and receiving port 72 of a phased array radar multifunctional subarray beamforming network of the present invention at 2.2 GHz. Comparing these graphs, it can be seen that the standing waves of each port of the multifunctional sub-array beam forming network of the present invention are relatively small, and have a certain bandwidth performance.

In a word, a phased array radar multifunctional sub-array beamforming network proposed by the present invention utilizes one network to form sub-array beams of different scales. The function of launching avoids the shortcoming of single function of the prior art solution.

The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the inventive concept of the present invention, some modifications and improvements can also be made, and these all belong to the present invention. protection scope of the invention.

Claims (10)

1. a kind of multi-functional submatrix beam-forming network of phased-array radar it is characterised in that by one-level submatrix beam-forming network, Two grades of submatrix beam-forming networks of the first via, two grades of the second tunnel submatrix beam-forming network, first via three-level submatrix Wave beam forming Network, the second tunnel three-level submatrix beam-forming network, the 3rd tunnel three-level submatrix beam-forming network and the 4th tunnel three-level submatrix ripple Bundle forms network composition, and described one-level submatrix beam-forming network includes one-level emission port and Primary Receive Port, and described two Two grades of road submatrix beam-forming network includes respective two grades of emission ports and Secondary Receive port, described four tunnel three-level submatrix ripples Bundle forms network and includes respective three-level emission port, three-level receiving port and TR channel interface, described one-level submatrix wave beam shape Two points of mouths becoming network are connected with described two grades of submatrix beam-forming networks of two-way respectively, described two grades of submatrix wave beam shapes of two-way Four points of mouths becoming network are connected with described four tunnel three-level submatrix beam-forming networks respectively.

2. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described One-level submatrix beam-forming network is made up of one-level emission port, Primary Receive Port, circulator and Wilkinson power divider, institute State one-level emission port and Primary Receive Port is respectively the transmitting input port of circulator and receives output port, described annular Total mouth of device is connected with total mouth of described Wilkinson power divider.

3. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described Two grades of submatrix beam-forming networks are by two grades of emission ports, Secondary Receive port, circulator and two Wilkinson power divider groups Become, described two grades of emission ports and Secondary Receive port are respectively the transmitting input port of described circulator and receive outfan Mouthful, described two Wilkinson power dividers form one-to-two power division network and with circulator and two-way three-level submatrix Wave beam forming Two grades of one tunnel of network composition submatrix beam-forming network.

4. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described Three-level submatrix beam-forming network is by three-level emission port, three-level receiving port, circulator and four Wilkinson power divider groups Become, described three-level emission port and three-level receiving port are respectively the transmitting input port of circulator and receive output port, institute State four Wilkinson power dividers to form one point four of power division network and form a road three with circulator and four TR channel interfaces Level submatrix beam-forming network.

5. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described One-level emission port, one-level submatrix beam-forming network, two grades of submatrix beam-forming networks of two-way, four tunnel three-level submatrix wave beam shapes Network and the launching beam of 16 TR channel interface one 16 unit submatrixs of composition is become to form network, described Primary Receive end Mouth, one-level submatrix beam-forming network, two grades of submatrix beam-forming networks of two-way, four tunnel three-level submatrix beam-forming networks and ten Six TR channel interfaces form the reception beam-forming network of 16 unit submatrixs.

6. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described Two grades of emission ports, two grades of submatrix beam-forming networks, two-way three-level submatrix beam-forming network and eight TR channel interface groups The launching beam becoming eight unit submatrixs forms network, described Secondary Receive port, two grades of submatrix beam-forming networks, two-way Three-level submatrix beam-forming network and the reception beam-forming network of eight TR channel interface one eight unit submatrixs of composition, described Phased-array radar multi-functional submatrix beam-forming network can form the transmitting of two-way eight unit submatrix and receive Wave beam forming net Network.

7. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described The transmitted wave of three-level level emission port, three-level submatrix beam-forming network and four TR channel interface one four unit submatrixs of composition Bundle forms network, and described three-level receiving port, three-level submatrix beam-forming network and four TR channel interfaces form one four list The reception beam-forming network of first submatrix, it is single that the multi-functional submatrix beam-forming network of described phased-array radar can form four tunnel four The transmitting of first submatrix and reception beam-forming network.

8. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described One-level submatrix beam-forming network, two grades of submatrix beam-forming networks of two-way and four tunnel three-level submatrix beam-forming networks can be same When use, or be used alone.

9. a kind of multi-functional submatrix beam-forming network of phased-array radar according to claim 1 is it is characterised in that described 16 TR channel interfaces press the battle array arrangement of equidistant face, realize corresponding blind joining with 16 TR assemblies of phased-array radar Interconnection.

10. a kind of phased-array radar multi-functional submatrix beam-forming network according to any one of claim 2 to 4, it is special Levy and be, Wilkinson power divider is processed based on microwave circuit boards technique, medium model Arlon CLTE-XT, monolayer Thickness 0.254mm, dielectric constant 2.94, values of isolation resistance is 100 ohm, circulator model Narda 4923, working frequency range 2GHz-4GHz, port standing wave is less than 1.3, Insertion Loss 0.4dB.